package com.shop.web.servlet;

import java.io.IOException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.shop.domain.Product;

public class UpdateCartServlet extends HttpServlet {

	private static final long serialVersionUID = 7715865743257658440L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

		String id = req.getParameter("id");
		int num = Integer.parseInt(req.getParameter("num"));
		Product product = new Product();
		product.setId(id);

		Map<Product, Integer> cart = (Map<Product, Integer>) req.getSession().getAttribute("cart");
		if(num <=0){
			cart.remove(product);
		}else {
			cart.put(product, num);
		}
		req.getSession().setAttribute("cart", cart);
		req.getRequestDispatcher("/cart.jsp").forward(req, resp);
	}
}
